"Dual Object Notation" -> "Twofold Object Notation"

[ton] / don / tags.py

diff --git a/don/tags.py b/don/tags.py
deleted file mode 100644 (file)
index db54dfe..0000000
--- a/don/tags.py
+++ /dev/null
@@ -1,138 +0,0 @@
-import collections
-
-VOID = 0x00
-TRUE = 0x01
-FALSE = 0x02
-BOOL = (TRUE, FALSE)
-INT8 = 0x10
-INT16 = 0x11
-INT32 = 0x12
-INT64 = 0x13
-# These are to be supported in the future
-# FLOAT = 0x20
-# DOUBLE = 0x21
-BINARY = 0x30
-UTF8 = 0x31
-UTF16 = 0x32
-UTF32 = 0x33
-LIST = 0x40
-DICTIONARY = 0x41
-
-STRING_TAGS = set([UTF8, UTF16, UTF32])
-
-DEFAULT_INTEGER_ENCODING = INT32
-DEFAULT_STRING_ENCODING = UTF8
-
-TaggedObject = collections.namedtuple('TaggedObject', ['tag', 'value'])
-
-_TYPES_TO_TAGS = {
-    int: DEFAULT_INTEGER_ENCODING,
-    bytes: BINARY,
-    str: DEFAULT_STRING_ENCODING,
-    list: LIST,
-    dict: DICTIONARY,
-    collections.OrderedDict: DICTIONARY,
-}
-
-def _tag(o):
-    if isinstance(o, TaggedObject):
-        return o
-
-    if o is None:
-        return TaggedObject(tag = VOID, value = o)
-
-    if o is True:
-        return TaggedObject(tag = TRUE, value = o)
-
-    if o is False:
-        return TaggedObject(tag = FALSE, value = o)
-
-    return TaggedObject(tag = _TYPES_TO_TAGS[type(o)], value = o)
-
-_NONE = TaggedObject(tag = VOID, value = None)
-_TRUE = TaggedObject(tag = TRUE, value = True)
-_FALSE = TaggedObject(tag = FALSE, value = False)
-
-_TAGS_TO_IN_RANGE_PREDICATES = collections.OrderedDict([
-    (INT8,  lambda i: -128 <= i and i <= 127),
-    (INT16, lambda i: -32768 <= i and i <= 32767),
-    (INT32, lambda i: -2147483648 <= i and i <= 2147483647),
-    (INT64, lambda i: -9223372036854775808 <= i and i <= 9223372036854775807),
-])
-
-class TooWideError(Exception):
-    pass
-
-SMALLEST = object()
-
-def autotag(o, **kwargs):
-    preferred_integer_tag = kwargs.pop('preferred_integer_tag', DEFAULT_INTEGER_ENCODING)
-    preferred_string_tag = kwargs.pop('preferred_string_tag', DEFAULT_STRING_ENCODING)
-
-    if kwargs:
-        raise TypeError("autotag() got an unexpected keyword argument '{}'".format(
-            list(kwargs.keys())[0],
-        ))
-
-    if isinstance(o, TaggedObject):
-        return o
-
-    if o is None:
-        return _NONE
-
-    if o is True:
-        return _TRUE
-
-    if o is False:
-        return _FALSE
-
-    if isinstance(o, int):
-        if preferred_integer_tag is not SMALLEST and _TAGS_TO_IN_RANGE_PREDICATES[preferred_integer_tag](o):
-            return TaggedObject(tag = preferred_integer_tag, value = o)
-
-        else:
-            for tag, in_range_predicate in _TAGS_TO_IN_RANGE_PREDICATES.items():
-                if in_range_predicate(o):
-                    return TaggedObject(tag = tag, value = o)
-
-            raise TooWideError("Integer {} is too wide to be serialized")
-
-    if isinstance(o, str):
-        # TODO Support SMALLEST for preferred string tag
-        return TaggedObject(tag = preferred_string_tag, value = o)
-
-    if isinstance(o, bytes):
-        return TaggedObject(tag = BINARY, value = o)
-
-    if isinstance(o, list):
-        return TaggedObject(
-            tag = LIST,
-            value = [
-                autotag(
-                    i,
-                    preferred_integer_tag = preferred_integer_tag,
-                    preferred_string_tag = preferred_string_tag,
-                ) for i in o
-            ],
-        )
-
-    if isinstance(o, dict):
-        return TaggedObject(
-            tag = DICTIONARY,
-            value = collections.OrderedDict([
-                (
-                    autotag(
-                        key,
-                        preferred_integer_tag = preferred_integer_tag,
-                        preferred_string_tag = preferred_string_tag,
-                    ),
-                    autotag(
-                        value,
-                        preferred_integer_tag = preferred_integer_tag,
-                        preferred_string_tag = preferred_string_tag,
-                    ),
-                ) for key, value in o.items()
-            ]),
-        )
-
-    raise Exception('Unsupported type {}'.format(type(o)))